Examples with EscherRecord org.apache.poi.ddf.EscherRecord used on opensource projects

Example 41 with EscherRecord

use of org.apache.poi.ddf.EscherRecord in project poi by apache.

the class PPDrawing method findEscherChildren.

/**
	 * Tree walking way of finding Escher Child Records
	 */
private void findEscherChildren(DefaultEscherRecordFactory erf, byte[] source, int startPos, int lenToGo, List<EscherRecord> found) {
    int escherBytes = LittleEndian.getInt(source, startPos + 4) + 8;
    // Find the record
    EscherRecord r = erf.createRecord(source, startPos);
    // Fill it in
    r.fillFields(source, startPos, erf);
    // Save it
    found.add(r);
    // Wind on
    int size = r.getRecordSize();
    if (size < 8) {
        logger.log(POILogger.WARN, "Hit short DDF record at " + startPos + " - " + size);
    }
    /**
		 * Sanity check. Always advance the cursor by the correct value.
		 *
		 * getRecordSize() must return exactly the same number of bytes that was written in fillFields.
		 * Sometimes it is not so, see an example in bug #44770. Most likely reason is that one of ddf records calculates wrong size.
		 */
    if (size != escherBytes) {
        logger.log(POILogger.WARN, "Record length=" + escherBytes + " but getRecordSize() returned " + r.getRecordSize() + "; record: " + r.getClass());
        size = escherBytes;
    }
    startPos += size;
    lenToGo -= size;
    if (lenToGo >= 8) {
        findEscherChildren(erf, source, startPos, lenToGo, found);
    }
}

Example 42 with EscherRecord

use of org.apache.poi.ddf.EscherRecord in project poi by apache.

the class PPDrawing method writeOut.

/**
	 * Write the contents of the record back, so it can be written
	 *  to disk
	 * Walks the escher layer to get the contents
	 */
public void writeOut(OutputStream out) throws IOException {
    // Ensure the escher layer reflects the text changes
    for (EscherTextboxWrapper w : textboxWrappers) {
        w.writeOut(null);
    }
    // Find the new size of the escher children;
    int newSize = 0;
    for (EscherRecord er : childRecords) {
        newSize += er.getRecordSize();
    }
    // Update the size (header bytes 5-8)
    LittleEndian.putInt(_header, 4, newSize);
    // Write out our header
    out.write(_header);
    // Now grab the children's data
    byte[] b = new byte[newSize];
    int done = 0;
    for (EscherRecord r : childRecords) {
        done += r.serialize(done, b);
    }
    // Finally, write out the children
    out.write(b);
}